They also work, but it's tiring to type <s-.>e<Space><c-r><s-5> (instead of just <s-.>$c).
It's 8 key press (where many of them are combined) vs. 4 (that are simple if one uses the right mappings, my $ is mapped to the key below ESC). The $c is at least 50% faster.

And <c-w> only deletes one word at a time. Sometimes you would have to press <c-w> 1 time other times 3 times (i.e. you would have to spend time thinking how many times to press <c-w> - i.e. slower).
You would have to press <C-q> only once in every situation.

Also we can set path options to specify multiple directory very freely, see :help 'path'.